M4.5 Earthquake south of the Fiji Islands — July 19, 2025
2025-07-19 23:45:50 UTC (2025-07-19) · approx. 11:45 AM UTC-12 local
On July 19, 2025 at 23:45 UTC, a magnitude 4.5 shallow crustal earthquake struck south of the Fiji Islands, at a depth of 10.0 km and coordinates -24.3880°, -176.0835°. This earthquake was detected by 21 seismic stations with good location accuracy and was assigned a USGS significance rating of 312, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.5 releases seismic energy equivalent to roughly 85 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 767 m — a useful intuition for the size of the slip patch on the fault.
The epicenter is located in Fiji, a region characterized by the Fiji Fracture Zone at the junction of the Pacific and Australian plates, with deep-focus seismicity from the subducted slab. View all earthquakes in Fiji.
Learn more: Magnitude scale · Aftershock sequences
Earthquake Details
-176.0835°E
Technical Information
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Common Questions
How strong was the magnitude 4.5 earthquake south of the Fiji Islands?
The magnitude 4.5 earthquake that struck south of the Fiji Islands on July 19, 2025 at 23:45 UTC had a depth of 10.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -24.3880°, -176.0835°, which is south of the Fiji Islands. View all earthquakes in Fiji.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.5 earthquakes can continue for several days and gradually diminish over time.
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Location
Authoritative source: USGS event page (event ID: us6000qx10). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, July 19, 2025). M4.5 Earthquake south of the Fiji Islands — July 19, 2025. Retrieved October 3, 2025 from https://www.earthquaketracker.org/earthquakes/event/us6000qx10/